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/* xattr.h -- POSIX Extended Attribute support.
Copyright (C) 2016, 2018-2020 Free Software Foundation, Inc.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3, or (at your option)
any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, see <http://www.gnu.org/licenses/>. */
#include "wget.h"
#include <stdio.h>
#include <string.h>
#include "log.h"
#include "utils.h"
#include "xattr.h"
#ifdef USE_XATTR
static int
write_xattr_metadata (const char *name, const char *value, FILE *fp)
{
int retval = -1;
if (name && value && fp)
{
retval = fsetxattr (fileno (fp), name, value, strlen (value), 0);
/* FreeBSD's extattr_set_fd returns the length of the extended attribute. */
retval = (retval < 0) ? retval : 0;
if (retval)
DEBUGP (("Failed to set xattr %s.\n", quote(name)));
}
return retval;
}
#else /* USE_XATTR */
static int
write_xattr_metadata (const char *name, const char *value, FILE *fp)
{
(void)name;
(void)value;
(void)fp;
return 0;
}
#endif /* USE_XATTR */
int
set_file_metadata (const struct url *origin_url, const struct url *referrer_url, FILE *fp)
{
/* Save metadata about where the file came from (requested, final URLs) to
* user POSIX Extended Attributes of retrieved file.
*
* For more details about the user namespace see
* [http://freedesktop.org/wiki/CommonExtendedAttributes] and
* [http://0pointer.de/lennart/projects/mod_mime_xattr/].
*/
int retval = -1;
char *value;
if (!origin_url || !fp)
return retval;
value = url_string (origin_url, URL_AUTH_HIDE);
retval = write_xattr_metadata ("user.xdg.origin.url", escnonprint_uri (value), fp);
xfree (value);
if (!retval && referrer_url)
{
struct url u;
memset(&u, 0, sizeof(u));
u.scheme = referrer_url->scheme;
u.host = referrer_url->host;
u.port = referrer_url->port;
value = url_string (&u, 0);
retval = write_xattr_metadata ("user.xdg.referrer.url", escnonprint_uri (value), fp);
xfree (value);
}
return retval;
}
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